car covers first 100 km in 2 hours and then travels at a speed of 60 km/hr for 1 hours. Find the average speed of the bus for the whole journey.
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Step-by-step explanation:
As we know that
speed=
time
distance
Distance travelled by the car in 1
2
1
hours when travelling with the speed of 60km/hr=60×
2
3
=90km
Total distance travelled by the car =100+90=190km
Total time taken =
2
5
+
2
3
=4 hours
Therefore,
Average speed =
total time
Total distance
=
4
190
=47.5km/hr
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